Crumble the yeast in a bowl.
Heat up the milk to it becomes finger warm, and mix it with the yeast. Stir until it is lump free.
Add 50 gr of flour in the mixture and stir well. Let it rest for 30 minutes.
With an electrical mixer mix 1 egg and the sugar together, add it in the milk and yeast mixture.
Add the butter and the flour bit by bit while stirring. The dough is ready when it let go from the edge of the bowl.
Start the oven at 30 degrees Celsius and place the bowl with the dough in the oven for 30- 1 hour. Make sure the dough double in volume.
Take out the dough from the oven and press out all the bubbles.
Divide the dough in pieces of 60-80 gr each. Roll them in the form you like and place them on a baking paper on a baking sheet.
Start the oven at 180 degrees Celsius.
Beat an egg and brush the bread on top. Make small cuts on top of the bread before you place them in the middle of the oven for 10 minutes.
Take the bread out and let them cool down before you eat them.